ppa/ release cover- experiences?

I'm returning from maternity leave to 2 days a week, ht has suggested covering classes as an alternative to job share which I've jumped at! I'm wondering about logistics- do you get ppa yourself? Do you plan your lessons or teach from the class teachers' planning? If so are resources etc ready for you when you go in? How do you communicate with these teachers? What is workload like compared to having your own class?

I did this a few years ago just after McCrone time started. In my school, and most I know of, you are responsible for planning the lessons you deliver. You do get your own time pro rata for the hours you are in. I tended to cover stand alone subjects or took areas that were only my responsibility - RE, PE, ICT, French etc. I enjoyed doing it, working throughout the school, and nuresery,was a new challenge! Hope this helps